Cutting rolls and knives for box-making machines.



I PATENTED 0M4, 1906. E. G; STAUDB. 1) KNIVES FOR BOX MAKING MACHINES.APPLICATION I'ILED DEO.12,'1902.

I" N X V I de CUTTING ROLLS AN UNITED STATE PATENT @FFICE.

CUTTING ROLLS AND KNIVES FOR- BOX-MAWNG. MACHINES.

Specification of Letters Patent.

Patented. Dec. 4, 1906.

A plication filed December 12.1902. Serial No. 134,903.

To all whom, it Duty (2071420771,.-

Be it known that I, EDWIN G. STAUDE, of Minneapolis, Hennepin county,Minnesota,

have invented certain new and useful lming flexible boxes, andparticularly to the cutting rolls and knives therefor.

The object of the invention is to. provide blank-cutting means for usein connection with the machine shown and described in Letters Patent ofthe United States -issued- December 9, 1902, No. 7l5,620,-wherein theblanks travel in one direction from the rolls through the foldingdevices to the discharge end of the machine.

A further object is to provide cuttingknives that will cut and sever theblanks of light or heavy stock without danger of tearing or otherwisemutilating it.

Other ob'ects of the invention will appear from the following detaileddescription.

The invention consists generally in revolv ing coacting rolls havingslitting and sever ing knivesarranged thereon in groups, the groups onone roll being opposite corresponding spaces on the other roll andcoinciding therewith as the rolls revolve.

Further, the invention consists in various constructions andcombinations, all as hereinafter described, and particularly pointed outin the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a perspective view of revolv'rig cutting-rolls, show- 'ing therecesses thereinand knives alternat- Fig. 2 is a transverse section.

ing therewith. through the rolls and knives.

In the drawings, 2 represents rolls of the same diameter arranged oneabove the other and having journals 3, supported in suitable hearings onthe frame of the machine. The rolls travel in opposite directions, asindicated b the arrows, to feed the stock hetwe'en tiem and are providedwith gears 4, operated from a suitable source of power.

In the periphery of each roll, extending lengthwise thereofil arrangescoring-knives or cutters 5 and severing-knives o. I also providetransverse cutting or slitting knives 7, arranged substantially at rightangles to the sevcring-knives and conforming to the rounded surface ofthe roll. The groups of knives are arranged upon opposite sides of animaginary linerunning lengthwise of the rolls, and alternating with saidgroups I provide recesses or depressions 8 in the peripheries, therecesses of one roll being opposite and adapted to receive thecorresponding group of knives on the other roll and each group of knivesbeing ada ted when it enters a recess to coact with tie knives of theabutting groups, making a shear cut therewith to slit and sever theblanks. l have arranged one row of groups of knives and one of recesseson each roll, so that a blank will be slit and severed with eachrevolution, and I arrange them zigzag, for I have found that where theknives are arranged in groups close together and operate in quicksuccession upon the stock it all the knives were arranged in onestraightrow and the recesses in another the tongues formed in the stockwould all be forced .1p or down, and as the slitting-knives would engagethe stock before those that sever it tire tongues would be pressed sofar one way or the other that it would be necessary to havesevering-knives of greater depth than the others, and even then therewould begreat danger of tearing or otherwise mutilating the stock by theaction of the slitting-knives pressing the tongues in one directionbefore the other knives could perform their function. Furthermore, itwould be impracticable to have the severingknives of greater depth thanthe others 1n rolls of small diameter, owing to the fact that theoutside or cutting edges of the knives would project too far above thepitch-line of the rolls and the counting knives would not meet to make aclean shear cut, but would have a rolling motion similar to the addendumof an ordinary gear-tooth.

'lo obviate the necessity of having knives of (lill'crent depth and thedanger of tearing the stock, I armugc the recesses up "r positc sides ofan imaginary line, as described, alternating with the groups of severingand slitting knives, and with this arrangement the stock is pressed u")to form one tongue andv in the opposite sary to have cutting edges ofsullicient depth on all the knives to pass th: Jugh the stock.

At the ends of the rolls 1 )rovide knives 9 upon oppositosides of thelongitudinal line cooperating with recesses 10 to cut out the waste iece1-1 in the sides of the blanks to form the short tongue 12 thereon. Itsometimes happens that this waste piece will ircction to form the.;other, as shop. in Fig. 1, and it is only necesprovide a knocker-arm13, mounted -on a shaft 14, that carries a gear 15, meshing with thegear 4. The gear 15 will have the same number of teeth as the gear lankspass by.

claim as my inv ention a 1. -The combination with a roll, of severingand slitting knives arranged in sets thereon, the severing-knivesextending lengthwise of the roll and the slitting-knives transverselythereof, and the slitting-knives of the contiguous sets beingon oppositesides of the severing-knives of those sets, substantially as described.

2. The combination with a roll, of severing and slitting knives arrangedin sets or groups thereon, the severing knives extending lengthwise ofthe roll substantially in line with one another and the slitting-knivestransversely on the roll, and the slittingknives of contiguous setsbeing located on opposite sides of the severing-knives of those sets,substantially as described. e combination with the revolving rolls, ofslitting or severing knives arranged in sets or groups thereon, thesevering-knives extending'lengthwise of the ting-knives transverselythereof, and there being blank of the rolls alternating with the sets ofknives thereon, substantially as described.

4. The combination, with the rolls having eripheral recesses, ofsevering and slitting linives mounted on said rolls and alternating withsaid recesses, the knives of one roll being opposite the correspondingrecesses in the other roll and having a shear cut with the contiguousknives, for the purpose specified;

5. The combination, with the revolving rolls having peripheral recessesarranged zig zag uponop osite sides of a straight line parallel with t eaxis thereof, of severing and slitting knives 6 and 7 fitting withinsockets in the periphery of said rolls substantially at right angles toeach other and in groups alternating with said recesses, each group onone roll being op uosite a corresponding recess in the other roll andadapted to enter the rolls and the slitspaces provided on the surfaces ll r 1 shear cut with the knives the rolls and alternating with saidrecesses,

whereby a group of knives in one rollwill be opposite a recess in theother roll, comparatively short severing-knives 9 provided near one endof each roll in the opposite roll, substantially as'describe 7. Thecombination with a roll, of severing and slitting knives arranged insets thereon,

and adapted to enter a the severing-knives extending lengthwise of n themiddle portion of the rolls and the slittingknives transversely thereof,the slittingknives of contiguous sets bein on opposite sides of thesevering-knives of those sets, and there being comparatively shortseveringknives 9 at one end of the roll extending lengthwise thereof,and transverse slittingknives connecting them, substantially asdescribed.

8. The combination with the revolving rolls havin peripheraldepressions, of the longitudina ly-arranged severing-knives and thetransverse]y-arranged slitting-knives alternating on the surface of therolls with said depressions and the comparatively short severing-knives9 )rovided at the ends of said rolls and the sl inner ends of saidknives 9, substantially as described.

9. The combination, with the revolving l rolls having peri )heraldepressions, of sever ing and slitting knives alternating With saiddepressions in the surfaces'of the rolls whereby up and down cuts willhe alternately made in the stock, substantially as described.

In witness whereof I have hereunto set my hand this 9th day of December,1902.

EDWIN G, STAUDE.

/ corresponding recess i I l In presence of M. 0. N OONAN, C. G. Hanson.

